(2分之x-y)的平方-4分之1(x-y)(x+y)

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/02 10:10:34
(2分之x-y)的平方-4分之1(x-y)(x+y)

(2分之x-y)的平方-4分之1(x-y)(x+y)
(2分之x-y)的平方-4分之1(x-y)(x+y)

(2分之x-y)的平方-4分之1(x-y)(x+y)
(1/2x-y)²-1/4(x-y)(x+y)
=1/4x²-xy+y²-1/4x²+1/4y²
=-xy+5/4y²

((x-y)/2)^2-(x-y)(x+y)/4
(x^2-2xy+y^2-x^2+y^2)^2/4
(y^2-2xy)/2